Christian Cooper told NBC’s local affiliate WNBC that he was bird watching in the park on Monday when he noticed a dog running free. He approached the woman walking the dog to ask that she put it back on a leash as regulated. The woman refused and Cooper began filming their interaction, which his sister later posted on Twitter.

In the video, the woman who has identified herself as Amy Cooper — no relation to Christian — asks him to stop filming while pulling out her phone and saying: “I’m going to tell them there’s an African American man threatening my life.”…

“I sincerely and humbly apologize to everyone, especially to that man, his family,” Amy Cooper said in a phone interview with WNBC. “It was unacceptable and I humbly and fully apologize to everyone who’s seen that video, everyone that’s been offended … everyone who thinks of me in a lower light and I understand why they do.”